/*
 gcc showtxt.c testloadso.c -lmingw32 -lSDL2_test -lSDL2main -lSDL2  && a --hello test.dll
 gcc showtxt.c testloadso.c -lmingw32 -lSDL2_test -lSDL2main -lSDL2  && a test.dll putstr
 gcc testloadso.c -lSDL2 -lSDL2_ttf -lSDL2_mixer -lSDL2_image && ./a.out
 Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>

 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
 arising from the use of this software.

 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely.
 */

/* Test program to test dynamic loading with the loadso subsystem.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "SDL2/SDL.h"

typedef int (*fntype) (const char *);

int main(int argc, char *argv[])
{
	int retval = 0;
	int hello = 0;
	const char *libname = NULL;
	const char *symname = NULL;
	void *lib = NULL;
	fntype fn = NULL;
	SDL_Renderer *renderer;
	char*show_str;
	renderer = (SDL_Renderer*)init_();

	if (argc != 3) {
		const char *app = argv[0];
		show_str = (char*)append_str(show_str, "USAGE: %s <library> <functionname>\n", app);
		show_str = (char*)append_str(show_str, "       %s --hello <lib with puts()>\n", app);
		draw_str(renderer,0,0,show_str,240,320);
		SDL_Delay(6000);        /* Effects only have length 5000 */
		return 1;
	}



	if (strcmp(argv[1], "--hello") == 0) {
		hello = 1;
		libname = argv[2];
		symname = "putstr";
	} else {
		hello = 1;
		libname = argv[1];
		symname = argv[2];
	}

	lib = SDL_LoadObject(libname);
	if (lib == NULL) {
		show_str = (char*)append_str(show_str, "SDL_LoadObject('%s') failed: %s\n", libname, SDL_GetError());
		draw_str(renderer,0,0,show_str,240,320);
		retval = 3;
	} else {
		fn = (fntype) SDL_LoadFunction(lib, symname);
		if (fn == NULL) {
			show_str = (char*)append_str(show_str, "SDL_LoadFunction('%s') failed: %s\n", symname, SDL_GetError());
			draw_str(renderer,0,0,show_str,240,320);
			retval = 4;
		} else {
			//return 0;
			show_str = (char*)append_str(show_str, "Found %s in %s at %p\n", symname, libname, fn);
			if (hello) 
			{
				show_str = (char*)append_str(show_str, "Calling function...\n");
				fflush(stdout);
				fn("     HELLO, WORLD!\n");
				show_str = (char*)append_str(show_str, "...apparently, we survived.  :)\n");
				show_str = (char*)append_str(show_str, "Unloading library...\n");
				fflush(stdout);
			}
			draw_str(renderer,0,0,show_str,240,320);
		}
		SDL_UnloadObject(lib);
	}
	SDL_Delay(6000);        /* Effects only have length 5000 */
	SDL_Quit();
	return retval;
}

